开发了二次曲面体的三维位姿和它的图象轮廓线之间的闭式映射关系，该关系可用于从灰度图象鲁棒地提取的二次曲线参数直接确定二次面体的三维位姿。实验例证了此技术是快速，高效和鲁棒的。

A new technique to extract the 3D vision information of conicoids robustly from their gray level image is successfully developed in this paper.The closed mapping relationship between the 3 D position and attitude of a conicoid and its image contour is explicitly derived.The relationship can be applied to efficiently determining the position and attitude of a concoid from the conics robustly extracted from the gray level image by means of the technique mentioned in .The experiments have demonstrated that the technique is fast, efficient and robust.